Understood that buildbots are required. The subject has come up a couple of times on mobile-sig - however, I haven't got a good answer for exactly what this means in practice. Does build hardware need to be delivered to a specific build farm location, or can it just run in my home office? Does it need to be running 24/7, or just guarantee that at least X builds per week, or Y% of all builds are tested?
In terms of physical specifications - at a minimum, at least two iDevices will be required (an ARMv7 device, like a 5th Gen iPod, and an ARM64 device, like an iPhone 5S), tethered to a Mac that runs the simulator.
In terms of execution - there's definitely ways to remote-control the deployment and execution of apps, so I imagine buildbot integration is in the realm of the possible.
Android will have similar requirements, but Android also has an emulator which would allow testing without the existence of a physical device, which would provide an alternative approach.